Money wise, it's not worth it. Save that cash for the next one or get it when it's $20.

I got the bundle for $50. So, if you get the stand alone ($40 as of today) you still need to pay $15 for the DLC (if you want more maps that were actually included in the PS3 version at one point , yet I think it was $10 when released) and end up paying more for one game instead of two.